From the Document: "This collection of documents, spanning three decades from the 1960s to the 1980s, focuses on CIA's collection and analysis of the Soviet Navy. [...] Many of the documents in this collection reflect the tensions in the bipolar Cold War and specifically focus on the Soviet Navy's development of its naval forces during that timeframe. After World War II, U.S. leaders faced a nuclear armed rival and in no time, Soviet tanks were in the streets of Budapest, and the first Sputnik satellite was launched. Understanding how the Soviet Union envisioned the next combat situation required in-depth knowledge of both their high-level theory of warfare and probable tactical behavior. The collection will provide new insight into the Agency's analysis of the evolving Soviet Navy and its military posture during the Cold War."
Central Intelligence Agency (CIA): https://www.cia.gov/